Fiy, found Socketify https://socketify.net/

[bogdanbiv]

I hope this is useful for you, perhaps you could join hands and get browsers to implement UDP sinks. There's a new effort trying to achieve a similar result, I guess, https://socketify.net/, description:

What? A cross-platform, cross-browser extension for desktop browsers that injects simple & easy-to-use UdpPeer, TcpServer and TcpClient sockets API into page window, available in plain JavaScript.